Minimal Seesaw as an Ultraviolet Insensitive Cure for the Problems of Anomaly Mediation

TL;DR

This paper proposes a minimal seesaw model within supersymmetric left-right frameworks that naturally resolves anomaly mediation's tachyonic slepton issue while maintaining ultraviolet insensitivity, leading to distinctive gaugino and sfermion spectra.

Contribution

It introduces a minimal seesaw scenario that cures anomaly mediation problems and predicts unique low-energy spectra, differing from traditional models.

Findings

Resolves tachyonic slepton masses in anomaly mediation

Predicts condensed gaugino and sfermion spectra

Maintains ultraviolet insensitivity

Abstract

We show that an intermediate scale supersymmetric left-right seesaw scenario with automatic R-parity conservation can cure the problem of tachyonic slepton masses that arises when supersymmetry is broken by anomaly mediation, while preserving ultraviolet insensitivity. The reason for this is the existence of light B - L = 2 higgses with yukawa couplings to the charged leptons. We find these theories to have distinct predictions compared to the usual mSUGRA and gauge mediated models as well as the minimal AMSB models. Such predictions include a condensed gaugino mass spectrum and possibly a correspondingly condensed sfermion spectrum.